163900390 has 8 divisors (see below), whose sum is σ = 295020720. Its totient is φ = 65560152.

The previous prime is 163900381. The next prime is 163900409. The reversal of 163900390 is 93009361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8195010 + ... + 8195029.

It is an arithmetic number, because the mean of its divisors is an integer number (36877590).

Almost surely, 2^163900390 is an apocalyptic number.

163900390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163900390 is a deficient number, since it is larger than the sum of its proper divisors (131120330).

163900390 is a wasteful number, since it uses less digits than its factorization.

163900390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16390046.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 163900390 is about 12802.3587670398. The cubic root of 163900390 is about 547.2595247871.

The spelling of 163900390 in words is "one hundred sixty-three million, nine hundred thousand, three hundred ninety".